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  <meta name="description" content="JSON基本概念 JSON：JavaScript对象表示法（JavaScript object Notation）  JSON是存储和交换文本信息的语法，类似XML。它采用键值对的方式来组织，易于人们阅读和编写，同时也易于机器解析和生成  JSON是独立于语言的，也就是说不管什么语言，都可以解析JSON，只需要按照JSON的规则就行   JSON与XML比较 JSON的长度和XML格式比起来很短小">
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      JSON格式
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        <h2 id="JSON基本概念"><a href="#JSON基本概念" class="headerlink" title="JSON基本概念"></a>JSON基本概念</h2><ul>
<li><p>JSON：JavaScript对象表示法（JavaScript object Notation）</p>
</li>
<li><p>JSON是存储和交换文本信息的语法，类似XML。它采用键值对的方式来组织，易于人们阅读和编写，同时也易于机器解析和生成</p>
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<li><p>JSON是独立于语言的，也就是说不管什么语言，都可以解析JSON，只需要按照JSON的规则就行</p>
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</ul>
<h3 id="JSON与XML比较"><a href="#JSON与XML比较" class="headerlink" title="JSON与XML比较"></a>JSON与XML比较</h3><ul>
<li><p>JSON的长度和XML格式比起来很短小，在网络传输的过程中可以大大减少带宽</p>
</li>
<li><p>JSON读写的速度更快</p>
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<li><p>JSON可以使用JavaScript内建的方法直接进行解析，转换成JavaScript对象，非常方便</p>
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<h3 id="JSON语法规则"><a href="#JSON语法规则" class="headerlink" title="JSON语法规则"></a>JSON语法规则</h3><ul>
<li><p>JSON数据的书写格式是：名称/值对</p>
<p>  名称/值对组合中的名称写在前面（在双引号中），值对写在后面（同样写在双引号中），中间用冒号隔开：比如”name”:”郭靖”</p>
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<li><p>JSON的值可以是下面这些类型：</p>
<p>  数字（整数或浮点数），比如123, 1.23</p>
<p>  字符串（在双引号中）</p>
<p>  逻辑值（布尔值 true或false）</p>
<p>  数组（在方括号中）</p>
<p>  对象（在花括号中）</p>
<p>  null</p>
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<h3 id="JSON约定"><a href="#JSON约定" class="headerlink" title="JSON约定"></a>JSON约定</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">    &quot;success&quot;:true,                     //表示是否正确执行了，请求是否成功</span><br><span class="line">    &quot;msg&quot;:&quot;xxx&quot;,                        //这个请求为false时返回的信息</span><br><span class="line">    &quot;data&quot;:&quot;xxx&quot;                        //这个请求的返回值</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">    &quot;success&quot;:true,                     //表示是否正确执行了，请求是否成功</span><br><span class="line">    &quot;msg&quot;:&quot;xxx&quot;,  </span><br><span class="line">&#125;                      //返回的信息</span><br></pre></td></tr></table></figure>
      
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